Puede ring manggaling ang bad breath sa tonsils. There is this thing called tonsil stones or tonsilloliths na namumuo sa loob ng tonsils and it’s normal and more common than we think. It’s a combination of food particles, bacteria, dead white blood cells, etc. You would have to use your finger to press on your tonsils top pop them out. This person could also get their sinuses checked baka may sinus infection sila dahil puede ring maging cause yon ng bad breath.